“Hate-filled rhetoric is somehow more acceptable when it’s delivered by those wearing green shirts instead of brown”

Glenn “InstaPundit” Reynolds sobre el fundamentalismo ambiental, el fundamentalismo religioso bueno:

In contemporary America, no respectable person would advocate, say, the involuntary sterilization of blacks or Jews. Why, then, should it be any more respectable to advocate the involuntary sterilization of everyone? Or even of those who cause “social deterioration?”

Likewise, references to particular ethnic or religious groups as “viruses” or “cancers” in need of extirpation are socially unacceptable, triggering immediate thoughts of genocide and mass murder.

Why, then, should it be acceptable to refer to all humanity in this fashion? Does widening the circle of eliminationist rhetoric somehow make it better?